Cutting blade



FIG. 1 is a side plan view of a cutting blade showing our new design;

FIG. 2 is a side view opposite FIG. 1;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front plan view thereof; and,

FIG. 6 is a rear view thereof. 

The ornamental design for a cutting blade, as shown and described. 